US 12,006,483 B2
Phosphorous-free oil soluble molybdenum complexes for high temperature naphthenic acid corrosion inhibition
Oussama Zenasni, Houston, TX (US); Philip Andrew Thornthwaite, Wigan (GB); Maria DeJesus Marquez, Houston, TX (US); and John Nathan Scholz, Sugar Land, TX (US)
Assigned to ECOLAB USA INC., St. Paul, MN (US)
Filed by Ecolab USA Inc., St. Paul, MN (US)
Filed on Jul. 27, 2021, as Appl. No. 17/443,591.
Claims priority of provisional application 63/058,010, filed on Jul. 29, 2020.
Prior Publication US 2022/0033725 A1, Feb. 3, 2022
Int. Cl. C10G 75/02 (2006.01); C10G 7/02 (2006.01); C10G 7/10 (2006.01); C23F 11/16 (2006.01)
CPC C10G 75/02 (2013.01) [C10G 7/10 (2013.01); C23F 11/16 (2013.01)] 19 Claims
 
1. A method of inhibiting corrosion of a metal surface that is contacted by a hydrocarbon fluid source containing acidic corrodents, comprising:
introducing into the hydrocarbon fluid source containing acidic corrodents a phosphorus-free, sulfur-containing molybdenum complex having the general formula selected from Formula II:

OG Complex Work Unit Chemistry
wherein R and R′ each represents a group selected from an alkyl group comprising one or more hydroxyl groups, an alkyl group, an alkenyl group, or an aryl group; and each X represents oxygen or sulfur and can be the same or different but where at least one X in Formula II is sulfur.